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3 years ago

13

Students in Mrs. Walsh’s math class wanted to know the favorite snacks of students in the school. How could they generate a rand

om sample to survey?

1 answer:

frozen [14]3 years ago

6 0

Answer:

Step-by-step explanation:

Abajkavsowvsj some people who have never in the game and have a lot

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What is the sum of the first 4 terms of a geometric sequence that has a first term of 2 and a ratio (multiplier) of 8?

taurus [48]

$\bf \qquad \qquad \textit{sum of a finite geometric sequence} \\\\ S_n=\sum\limits_{i=1}^{n}\ a_1\cdot r^{i-1}\implies S_n=a_1\left( \cfrac{1-r^n}{1-r} \right)\quad \begin{cases} n=n^{th}\ term\\ a_1=\textit{first term's value}\\ r=\textit{common ratio}\\ ----------\\ a_1=2\\ r=8\\ n=4 \end{cases} \\\\\\ S_4=2\left( \cfrac{1-8^4}{1-8} \right)\implies S_4=2\left( \cfrac{-4095}{-7} \right) \\\\\\ S_4=2(585)\implies S_4=1170$

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3 years ago

Evaluate the expression for k = 2. –9 + 7k =

zhannawk [14.2K]

Answer:

k = 7/6

Step-by-step explanation:

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3 years ago

at marshall middle school students choose one main dish one vegtable and one fruit eachday.how many luch combinations are avalil

Setler [38]

Answer:

9

Step-by-step explanation:

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3 years ago

What’s the value of x?

GaryK [48]

12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc12ewrgfbrfc

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3 years ago

If AB = 8, and OX = 3 and is the perpendicular bisector of AB, which is the length of the diameter of this circle?

Sladkaya [172]

Answer:

C. 5

Step-by-step explanation:

OXA is a 3-4-5 right triangle, so the circle radius is OA = 5.

_____

By the Pythagorean theorem,

AO² = OX² +AX² = 3² +4² = 9 +16 = 25

AO = √25 = 5 . . . . circle radius

_____

<em>Comment on Pythagorean triples</em>

The triple of integers (3, 4, 5) is the smallest triple of integers that satisfies the relation of the Pythagorean theorem. The next smallest set is (5, 12, 13). These, and a few other similar triples such as (7, 24, 25) and (8, 15, 17) are often used in algebra and geometry problems because they make the numbers work out nicely. It is worthwhile to learn to recognize these.

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3 years ago